>>No. You can have only one clustered index per table.
>
>So, if I want to create a clustered index, I need to add clustered in it such as:
>
>

>CREATE CLUSTERED INDEX
>

>
>Or, when I want to create a clustered index, should I only ommit including it?

You need to explicitly specify CLUSTERED when you want to make the index CLUSTERED. By default it would be nonclustered.